Assalam-o-alekum brother Muslim,
ans 1:Riyah is any kind of posing or showoff. There is even Riyah in religion. For example if I try to post all this here to “Impress you aor others”, then it is considered Riyah. Riyah is a severe hidden disease that eats up a humal soul terribly. The most pious acts can become ugly if a person has riyah.
ans 2: Islam always talks about the quality of actions. Therefore, it is really “not” the quantity that Allah cares for. It is the quality of one’s actions that matters. For example:
“A SAJDA LATE AT NIGHT AND THE TEARS FALLING OUT OF A MOMIN’S EYES ARE VERY MEHBOOB (IMPORTANT) TO ALLAH.MAYBE THAT ONE SAJDA IS MORE IMPORTANT THAN THE WORSHIP OF ALL LIFE.”
Imam Mohammed Baqar (a.s), our fifth Imam said:
“The closest condition a person is in with Allah is when he/she is in a state of sajda and tears are falling out of his/ here eyes”
Imam Ali (a.s) said:
“If a person starts to think about Allah’s greatness and his blessings while in a state of Sajda, then he/she will never get up from Sajda.”
Humbly yours,
Humble